I have recently had this problem, and I have seen a few other people have to.. I think it was recently with the new patch update. Whenever I try to save, I get 'Error Code 12' which makes it unable to save. I've tried doing 'Save As..', and that's no different.
How can I fix this without losing any of my saves?
Sometimes using Reset Everything in Master Controller, pause the game, go to Map View, Save As... help you save for that time. But once it went wrong, it's going to be more and more painful if you insist to keep that save. I had to porter half of my town to a new world, maybe the save got bloated after a while, or CC, mods... went corrupted after a patch... Take a look at these suggestions: http://crinrict-help.blogspot.com/s...abel/Error%2012